geology. Stanley's assertion that 'the physical history and the biological history of the earth are inextricably interwined shapes his text throughout. The material is organized clearly and logically. The two-part progression resents basic principles first, then proceeds with a chronological study of the history of life. For everv interval, global events (such as general patterns of geographic change and major occurrences in the evolution and extinction of life) are reviewed within the context of plate tectonics. This review is followed bv a description of important regional events and their place within this global framework. Stanlev offers insightful observations on how environmental conditions have affected life through the ages. Numerous attractive illustrations enhance textual material. Chapter-ending reviews and exercises reinforce students' understanding and there are additional reading lists, a thorough glossary and useful appendices. Stanley has updated and improved his text to make i-t even more accessible to students. Notable changes include: Streamlined and reorganized chapter on mountain building, with new discussions of ancient plate movements Condensed and updated coverage of the Precambrian Updated and expanded discussions of mass extinctions throughout the text Additional material on isotopes and dating techniques Updated discussion of human evolution.

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